Goodwill and Other Intangible Assets (Other Intangibles - Finite-Lived) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Subject to amortization: [Abstract]
Gross carrying amount	$ 548	$ 551
Accumulated amortization	238	231
Contracts [Member]
Subject to amortization: [Abstract]
Gross carrying amount	125	125
Accumulated amortization	99	90
Land Rights And Easements [Member]
Subject to amortization: [Abstract]
Gross carrying amount	407	406
Accumulated amortization	138	135
Licenses And Other [Member]
Subject to amortization: [Abstract]
Gross carrying amount	2	20
Accumulated amortization	1	6
Intangible assets with no regulatory offset [Member]
Subject to amortization: [Abstract]
Amortization expense	5	9	$ 7
Forecasted amortization in 2021	5
Forecasted amortization in 2022	5
Forecasted amortization in 2023	5
Forecasted amortization in 2024	4
Forecasted amortization in 2025	4
Intangible assets with regulatory offset [Member]
Subject to amortization: [Abstract]
Amortization expense	9	8	8
Forecasted amortization in 2021	9
Forecasted amortization in 2022	8
Forecasted amortization in 2023	8
Forecasted amortization in 2024	2
Forecasted amortization in 2025	0
Other Intangibles Excluding Emission Allowances And Or Renewable Energy Credits [Member]
Subject to amortization: [Abstract]
Amortization expense	14	17	15
Forecasted amortization in 2021	14
Forecasted amortization in 2022	13
Forecasted amortization in 2023	13
Forecasted amortization in 2024	6
Forecasted amortization in 2025	4
Renewable energy credit
Subject to amortization: [Abstract]
Gross carrying amount	14	0
Accumulated amortization	0	0
PPL Electric Utilities Corp [Member]
Subject to amortization: [Abstract]
Gross carrying amount	387	384
Accumulated amortization	135	131
PPL Electric Utilities Corp [Member] \| Land Rights And Easements [Member]
Subject to amortization: [Abstract]
Gross carrying amount	385	382
Accumulated amortization	134	130
PPL Electric Utilities Corp [Member] \| Licenses And Other [Member]
Subject to amortization: [Abstract]
Gross carrying amount	2	2
Accumulated amortization	1	1
PPL Electric Utilities Corp [Member] \| Intangible assets with no regulatory offset [Member]
Subject to amortization: [Abstract]
Amortization expense	4	4	4
Forecasted amortization in 2021	4
Forecasted amortization in 2022	4
Forecasted amortization in 2023	4
Forecasted amortization in 2024	4
Forecasted amortization in 2025	4
Louisville Gas And Electric Co [Member]
Subject to amortization: [Abstract]
Gross carrying amount	93	93
Accumulated amortization	69	63
Louisville Gas And Electric Co [Member] \| Land Rights And Easements [Member]
Subject to amortization: [Abstract]
Gross carrying amount	7	7
Accumulated amortization	1	1
Louisville Gas And Electric Co [Member] \| OVEC power purchase agreement [Member]
Subject to amortization: [Abstract]
Gross carrying amount	86	86
Accumulated amortization	68	62
Louisville Gas And Electric Co [Member] \| Intangible assets with regulatory offset [Member]
Subject to amortization: [Abstract]
Amortization expense	6	5	6
Forecasted amortization in 2021	6
Forecasted amortization in 2022	6
Forecasted amortization in 2023	6
Forecasted amortization in 2024	1
Forecasted amortization in 2025	0
Kentucky Utilities Co [Member]
Subject to amortization: [Abstract]
Gross carrying amount	55	55
Accumulated amortization	34	32
Kentucky Utilities Co [Member] \| Land Rights And Easements [Member]
Subject to amortization: [Abstract]
Gross carrying amount	16	16
Accumulated amortization	3	4
Kentucky Utilities Co [Member] \| OVEC power purchase agreement [Member]
Subject to amortization: [Abstract]
Gross carrying amount	39	39
Accumulated amortization	31	28
Kentucky Utilities Co [Member] \| Intangible assets with no regulatory offset [Member]
Subject to amortization: [Abstract]
Amortization expense	0	1	0
Kentucky Utilities Co [Member] \| Intangible assets with regulatory offset [Member]
Subject to amortization: [Abstract]
Amortization expense	3	$ 3	$ 2
Forecasted amortization in 2021	3
Forecasted amortization in 2022	2
Forecasted amortization in 2023	2
Forecasted amortization in 2024	1
Forecasted amortization in 2025	$ 0

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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